Dynamat DynaTape

[rmorman]

Hello,
I've got my car torn down for some paint restoration and thought this would be a great oppertunity to quiet it down a bit. So I installed Dynamat in the car. I even got it put inside the door panels. My question is this: Does anybody use the DynaTape? If so, where and why?

Thanks,
Russ

 

[khan0165]

that looks great. I love the product... never used it myself, but that's only because with my crappy cars, I've never been able to justify the cost.
I know many that have used it and it works great. And it's very easy to install.

The way you've done it in yours is sort of the high-end of things (at least to my knowledge). For a regular cruiser, alot of people skip the doors and trunk.
A neat trick I saw once... instead of applying the insulation inside the door frame, this guy just taped it to the back of the door panel. It saved alot of time, and still muffled alot of road noice.
On higher-end cars, I've seen it applied also under the pillar panels, and double layers to pad around speakers. If you're looking for even more quiet, it helps to make a light (cardboard or laminate wood) panel for behind the seats, then apply the dynamat to that.

hope this helps

 

[rmorman]

khan0165,
I still need to do the roof and put some Dynaliner on the floor in the passenger compartment. In hindsight, I wish I had somehow done noise recordings before and then could compare it with the results. I don't THINK I'm gonna put any on the pillars or double up on the doors as I'm almost out and have only enough for the roof.

I did get 5 rolls of the DynaTape and haven't used it. I don't even see it used on the fliers on their web site. I was wondering if I should return it???

On a side note, I was looking for a way to dress up the trunk and cover the shiny stuff. Looked into a Monte SS or Buick Grand National trunk kit, but the 5 companies I contacted said that those won't fit a 1979 Monte. My biggest concern are the sides. Maybe I can make a cardboard template and use 1/4 plywood to help "square up" the trunk and keep stuff from hitting the insides of the rear quarters. I could carpet the plywood after that. Anybody have any experience with that?

Russ

 

[khan0165]

that sounds like a great idea. I've seen this done to a few cars... except they used sheet steel and welded it in.
PERSONALY, I like the idea of a wood or plastic panel. You can buy all sorts of coroplast or other types of corrugate plastic boards now. Or even laminated wood with a nice vinyl finish.
I would use the board so that I can still have access to behind the wheel well.

... I just started working at a company that makes custom cases. And we deal with all sorts of these materials.
... if you want, you can send me a template of the things you wanna cut. I can cut them out on the CNC, and pad & carpet them for you. I had the same plans for my car maybe this summer or the next.

 

[rmorman]

Thanks!
I'll let you know how it goes!

 

[-83MONTESS-]

Nice! How much of that mat did you go through? Im thinking about doing it to mine but idk how much to get.

 

[1979ratrod]

wow man looks good, how much did the mat in the car cost? and has anyone used any substitutes?

 

[FE3X CLONE]

Something to keep in mind, the sound deadening material like Dynamat and other's is a "structure born" sound deadener. Meaning that it's adding mass to a thin piece of metal to reduce the metals ability to transmit sound. But it is not something that will actually reduce road noise.
To reduce road noise you would have to also add a layer of a sound insulating foam that will block "air born" noises.

Adding the dynamat to a door panel would do nothing for the noise transmission through the panel. But it would help keep the plastic from "buzzing".

On my '87 I've sandwiched most of my panels between layers of sound deadening. The interior has two layers of 80mil sound deadening mat over the entire floor, rear wheel wells, trunk floor, 1/4 panels and rear seat bulkhead. On top of that is a layer of Cascade audio TG-1liquid Thermaguard and one layer of VB-1X liquid vibration dampener. When I had it on the rotisserie I did the same to the underside of the floor pans but with a total of 3 coats of just the VB-1X.
On top of the VB-1X on the interior I used multiple 1/8" layers of a product called Volera foam. This is what is used to help stop the air born sound transmission.

As far as the tape, I believe it is mostly used to tape seems in the sound deadening mat as well as to tape down wires to the floor board.

 

[FE3X CLONE]

wow man looks good, how much did the mat in the car cost? and has anyone used any substitutes?

There's quite a few "cheap" kits on Ebay that are pretty much just a roofing material you can buy at any hardware store. One product is called Peal-n-Seal.
For the floor and trunk of a vehicle this stuff works great and doesn't do too bad on doors however forget trying to use the cheap stuff overhead. When it gets hot in the summer, it will start to fall.

Oh and somewhere else to try sound deadening is the front fenders. 😉 While I had mine apart I coated the backside of the fenders with 3 coats of the VB-1X and a layer of the 80mil sound deadening material. They went from sounding like a tin can when you tap on the fender to feeling like your tapping on a piece of granite. 🙂

 

[rmorman]

I went through 2 of the Dynamat Mega Paks http://www.dynamat.com/products_automotive_dynamat_xtreme.html. Still was short about 4 sheets. I will need more to finish the roof and outer door panels (inner ones are done). I have also bought some of the Dynaliner for the floors to help with heat and noise. May also use it in the trunk http://www.dynamat.com/products_automotive_dynaliner.html. Hope it works!